Linear kinetic Alfvén waves in inhomogeneous plasma: Effects of Landau damping
1 Centre for Energy Studies, Indian Institute of Technology - Delhi-110016, India
2 Department of Physics and Astronomy, West Virginia University - Morgantown, WV 26506-6315, USA
Received: 9 November 2015
Accepted: 18 January 2016
The turbulent spectrum of kinetic Alfvén waves in inhomogeneous plasma is investigated in the presence of Landau damping. Inhomogeneities in transverse and parallel directions to the ambient magnetic field are incorporated in the dynamics. Numerical solutions of the equations governing kinetic Alfvén waves in the linear regime are obtained while retaining the effects of Landau damping, which have a significant impact on the frequency spectrum generated by propagating kinetic Alfvén waves. A semi-analytical model developed to elucidate the physics of this process is also described.
PACS: 52.35.Bj – Magnetohydrodynamic waves (e.g., Alfven waves) / 52.25.Xz – Magnetized plasmas / 52.38.Hb – Self-focussing, channeling, and filamentation in plasmas
© EPLA, 2016